Flush tank silencer



March 20, 1956 J, A, WARCH 2,738,851

FLUSH TANK SILENCER Filed OG. 21, 1952 ff 3.5 J'oH/v A. VVA/PCH.

MJ Mw.

United States Patent O FLUSH TANK SILENCER John A. Warch, Woodlawn, Md.Application October 21, 1952, Serial No. 315,875 3 Claims. (Cl. 181-49)This invention relates to filler tubes and more particularly to thoseused to fill the water tanks used with flush toilets.

In the conventional water tanks used with hush toilets the operation onthe filler valve in supplying water to the tank is controlled by a floatoperated valve which turns on or oif the water supply, when the water`in the tank reaches a predetermined level. The water passes from thesupply valve through an open ended pipe into the water tank and is quitenoisy.

lt is therefore an object of this invention to provide a device to beattached to the float operated supply valve that will allow the waterfrom the supply valve to enter the Water tank without the objectionablenoises produced during the filling cycle.

It is an additional object of this invention to provide a new andimproved means for filling a reserve water tank for use in flushingtoilets, that will be quieter than the present liller pipes.

It is a further object of this invention to eliminate the noise of therushing water when filling a water tank used for flushing ush toilets.

It is a further object of this invention to provide a new and improvedsilencer for use on tloat operated valves used to control the watersupply to and from the tank, that will be readily attachable 4to presentfloat operated valves to convert them from the present noisy type.

Other objects of the invention will become apparent as the invention ismore fully set forth.

For a better understanding of the invention and the objects thereof,reference is made to the accompanying drawings wherein a particular formof the invention is disclosed by way of example. The drawings when usedin conjunction with the following description explain the structure andoperation that embodies the principles of the invention and isemphasized in the appended claims.

Referring to the drawings:

Figure l is a side elevation of a oat operated filler valve with asilencer embodying this invention attached thereto;

Figure 2 is a plan view of the ure 1;

Figure 3 is a sectional view of the silencer shown in Figure l;

Figure 4 is a plan view of a disc used in this invention as seen alongline 4-4 of Figure 3; and

Figure 5 is a plan View of another disc as seen along line 5 5 of Figure3.

Similar reference characters refer to simila-ntparts throughout thedrawings.

In the construction shown in the drawings the water tank is providedwith a cover 11 and encases a conventional lloat operated valve 12 andfloat 13 operated through conventional linkage to control the passage ofwater through the pipe 14 to the tgpk in the usual manner. A silencer 15is attached to thsgpipe 14 at the op.

silencer shown in Fig posite end from the valve 12, and preferablycomprises a casing 16 having its upper end restricted and threaded at 17to receive the pipe 14. The lower end of the casing 16 is ythreaded at18 to receive a screw cap 19. The screw cap 19 is provided with a hole20 to allow the water to discharge therethrough and the c ap is used tofasten the silencing element 21 in the casing. The silencing elementpreferably comprises a stud 22 with threads 23 on its surface to receivethreaded separator collars 24 used to attach and hold the discs 25, 26,27 and 28 in spaced relationship with each other and to tighten themagainst the head 29 forming a part of the stud 22. The discs 25, 26, and27, iit inside the casing 16 and the disc 28 is larger in diameter andis clamped against the end of the casing 16 by the screw cap 19. Theholes 30 in the disc 25 are positioned in a single row and arepreferably about one-eighth of an inch in diameter. The holes 31 in thedisc 26 are about three thirty seconds of an inch in diameter, and theholes 32 in the disc 27 are preferably three sixty-fourths of an inch indiameter. The holes 31 and 32 in discs 26 and 27 are also preferablyarranged in a single row. The holes 33 in the disc 28 are smaller andpreferably arranged in two rows and are in this illustration aboutone-thirty-second of an inch in diameter. Although the diameters of theholes and the number of rows of holes used are given in this example itis not desired to limit this invention to the diameters and number ofholes mentioned because it has been found during the experimentsconducted, that the diameter and number of the holes used in the discswill vary to suit the different water pressures encountered during itsuse. The collars 24 may be spacer collars without threads, with the lastone threaded to clamp them together.

In the assembly of the unit shown, the disc 28 is positioned on the stud22 against its head 29 and a collar 24 is screwed on the stud to tightenthe disc 28, the disc 27 is slid over the stud 22 and another collar 24tightened against it, the disc 26 is then slid over the stud and a thirdcollar 24 screwed thereon the disc 25 is then positioned on the stud andthe fourth collar 24 screwed on the stud 22 to tighten the disc 25 inplace. The element 21 is then inserted in the casing 16 and the cap 19screwed into place to hold the element 21 about central in the casing.The unit is then screwed on the pipe 14 and is ready for operation.

While but one general form of the invention is shown in the drawings anddescribed in the specification, it is not desired to limit thisapplication for patent to this particular form as it is appreciated thatother forms could be made that would use the same principles and comewithin the scope of the appended claims.

Having thus described the invention, what is claimed is:

l. A silencer comprising a hollow cylindrical casing open at both ends,a disc closing one of said ends, said disc having a central openingtherethrough, an open ended screw cap threaded on the closed end of thecasing and retaining the aforesaid disc in place at the end of thecasing, a threaded stud extending through the casing to a point short ofthe open end of the casing and passing through the central opening inthe disc, said stud having a head resting against the underside of thedisc, a plurality of centrally apertured circular discs spaced along thelength of the stud and extending peripherally to the inner wall of thehollow casing and of smaller diameter than the first mentioned disc, anda plurality of collars between the discs threadedly engaging the stud,all of the aforementioned discs having openings therethrough varying indiameters from the lowermost to the uppermost of said discs, all of saidcollars when serially threaded on the stud from the lowermost to theuppermost interacting as lock nuts and maintaining the ciosing disc intight engagement with the head of the stud.

2. A silencer as set forth in claim 1 including threaded meansv at theopen end of the casing for attachment to l a pipe.

References Cited inthe le of this patent UNITED STATES PATENTS LoperJune 13, 1911 Becker June 6, 1916 Flockhart June 12, 1917 Webb July 5,1921 Yavitch Apr. 15, 1941 FOREIGN PATENTS Great Britain Sept. 12, 1917Great Britain July 11, 1918

